Matt Smith has been cast as the replacement for David Tennant as
the Time Lord in the BBC's sci-fi series Doctor Who. Ahead of Smith's incarnation as the 11th Doctor, we profile the young
actor who has just won the biggest role in British television.

Matt Smith has been cast as the replacement for David Tennant as the
Time Lord in the BBC's sci-fi series Doctor Who. Ahead of Smith's incarnation as the 11th Doctor, we profile the young
actor who has just won the biggest role in British television.

So who exactly is Matt Smith? There's no doubt a good proportion of
the viewers of the grand unveiling of the 11th Doctor Who in Saturday's BBC1 documentary Doctor Who Confidential hadn't
the foggiest when Smith's name came on the screen. And after all the feverish speculation that the next Doctor might be played
by a Hollywood film star or, better still, Bill Nighy, it felt like a comedown that David Tennant's successor is a 26-year-old
stripling with only two semi-popular dramas under his belt – the flaccid BBC1 literary adaptation The Ruby in the
Smoke and BBC2's underrated Party Animals. But that doesn't mean Smith's not the right man for the job. It's easy
to forget that the only major TV David Tennant had done before he became the Doctor was BBC3's hit-and-miss Casanova.
Besides, big stars won't want to be locked into a part for several years, even if Doctor Who is the biggest role in British
TV.

Like Tennant, Smith has already made his name on the stage before
becoming the Doctor, even if he hasn't done much screen work. He had several minor roles, one of which was in Alan Bennett's
National Theatre hit The History Boys. Then in 2007 came his major breakthrough: the part of a disturbed, abused adolescent
in the Royal Court's play That Face. Smith was "outstanding" according to The Daily Telegraph; "the star of the evening"
said The Sunday Times; "virtuoso", "mesmerising", "heart-rending" said three other critics. I saw his performance in
That Face and it was devastating.

But Smith has more than acting ability. He also looks the part. There's
the tousled coiffeur – "The hair!" as Steven Moffat, the series' new executive producer said on Saturday, with awe.
According to Moffat's fellow producer Piers Wenger, there's something about Smith which makes you believe that, despite his
youth, he really could be 900 years old: "There's a quirkiness to him, an unevenness to his face, a lot of stuff going on
behind the eyes. He hasn't got an entirely modern face."

Most importantly, Smith has the personality to be the Doctor. Unassuming
and "normal", this boy from Northampton isn't a product of a starry acting school, even if his sister is a backing dancer
for Take That. In fact, as a teenager, Smith wanted to be a footballer before an injury put paid to that ambition and he did
a stint at the National Youth Theatre instead. He then studied drama and creative writing at the University of East Anglia
– a place considerably more famous for its creative writing than its dramatics.

Perhaps these humble beginnings helped, but Smith is gregarious and
completely unpretentious as a person. You could see this in Saturday's BBC interview, in which he bubbled away about getting
the part: "You're watching Doctor Who and your flatmate's there and you're going, 'Ahhh I'd love to share that I'm
the new Doctor but I can't!'" I met Smith a couple of years ago in a bar and he was sweetly friendly. His rare interviewers
have found the same; "funny and charming" said The Evening Standard in 2008.

A 21st-century Doctor needs to be affable because the role now requires
much more than acting. Smith will have to cope with huge media interest, and also with a clamouring fan base mainly consisting
of children. This is why the shy Ben Whishaw, another young actor touted for the role, would have been the wrong choice. But
it is also why youth is now an essential part of the Doctor's make-up. Along with that fan base comes a huge merchandising
industry and children need a Doctor close enough to their own age to identify with.

So what will Smith's Doctor, who will "regenerate" in this year's
Christmas special, be like? Like Tennant, Smith is thin and gangly but handsome at second glance, so there is a danger of
the 11th Doctor seeming like a clone of 10th.

However Smith comes to the role without Tennant's in-depth knowledge
of the series and describes the next six months as a "time to build this Time Lord…to learn the history of the show",
which should give his interpretation freshness. His Doctor may also be boyishly mischievous – he spoke with relish of
"the sense of mischief" he got when he knew he'd be the Doctor.

He also spoke of the show's "magic". Smith is of the Harry Potter
generation and so his Doctor Who may be full of the sense of myth and mystery found in the tales of the boy wizard –
one quality that Tennant's Doctor maybe lacks.